Hand tacker



Nov. 3, 1953 F. s. BOR'oUGHs HAND TACKER 2 sylesis-sheet 1 Filed March 8, 1951 INVENTOR EXW/, 550ml] /25 ATTORNEY FIGA lFIGB F. s. BoRouGl-IS HAND TACKER Nov. 3, 1953 Filed March 8, 1955].

2 Sheets-Sheet 2 65 77 Fla@ FIG.8

' INVENTOR ATTORNEY Patented Nov. 3, 1953 1n tu a. Qompanying. drwhgs. irifwiichfisf Sh; arousillustrativeembodiments of this m2- Win11 parcs. when' n, and tha plunger ir; tsj

Fig. 7 is a cross-sectional view taken on line I-T of Fig. 1; and

Fig. 8 is a partial side elevational view of the device embodying the invention with parts broken away.

Referring now in detail to the drawing, I designates a tacker embodying the invention. The same comprises generally of a body |I, a depressable handle I2 pivoted thereto about pivot pin I3, a bracket I4 attached to the underside of the handle, a link I5 pivoted to the bracket as on pivot pin I3, a trigger I1 pivoted at its rear end to the lower end of the link as on pivot pin I8, and a plunger I9 adapted to be raised and abruptly released by the trigger when the handle is depressed, as will appear hereinafter.

The body comprises a pair of similar symmetrically disposed body portions 29. The body portions comprise parallel side walls 2| having lower end edges 2|a.. Extending inwardly from the side walls 2| are inwardly curved flanges 22 forming a hand hole 23. The flanges 22 have mutually contacting edges 22a as the meeting plane between said members 20. The side walls 2| have top inwardly curved portions 24 having meeting edges 24a in the plane of the edges 22a. The flanges 24 run along the top of the body members and are curved downwardly at their rear ends as at 25, and curved upwardly at their front end as at 2S. The rear ends of the body portions are cut away as at 21 for the purpose hereinafter appearing. The side walls 2|' have top edges 2S extending forwardly from the upper ends of the flanges 26. At the forward end of edges 28 are downwardly and forwardly curvedV edges 29 from which extend downwardly, straight edges 3Q.

Extending from the lower ends of edges 30 are horizontal shoulders 3|. At the forward ends of the side walls 2| are outwardly pressed U- shaped walls 32 having forward edges 33. The upper ends of the edges 33 extend to the rear ends of the edges 3|. Extending forwardly from the lower ends of edges 33 are horizontal edges 34. Extending downwardly from the forward ends of the horizontal edges 34 are front edges 35 which extend down to the underedges 2 Ia.

The side walls 2| (Fig. 8) are formed with horizontal slots 36 adjacent the front edges 35 and disposed below the outwardly pressed portions 32. Said side walls 2| are also formed with horizontal slots 38 (Fig. 4) disposed adjacent the edges 30 and above the outwardly pressed portions 32.

Body portions 20 are interconnected by means of a rear rivet 4D passing through suitable openings in the side walls 2l and located adjacent the rear end of the body. Said body portions are also interconnected by a transverse pin 4| (Figs. 2 and 8,) located at the centers of the rear curved shoulders of the U-shaped outwardly pressed portions 32.

At the upper front corners of the body portions 20 are suitable openings to carry the transverse pivot pin or rivet I3. Fitted over 'the front of the body 20 is a front cover member 45. Said front cover member comprises a front Vwall'4ii` and parallel side walls 41. The side walls 41 are formed with suitable bearing openings through which the pivot pin I3 passes. Said side walls 41 and the side walls 2| of the body members 22 are formed with suitable registering openings to receive therethrough a bolt or screw 48. When the bolt 48 is removed the front cover member 45 may be swung forwardly and upwardly. The

`58 received in the slots 33.

4 front wall 45 has a forwardly recessed or pressed vertical portion 59 for the purpose hereinafter appearing.

Mounted on and between the side walls 2| is a bottom stop member 5| having outwardly extending lugs 52 received within the slots 3E. At its forward end, bottom stop 5| has a slot or groove 53 for the purpose hereinafter appearing. Riveted to the top of the bottom stop 5| by means of rivet 54 is a rubber-like shock absorbed 55.

Mounted on and between the side walls 2| of the body members 26 is a top stop 51 having lugs Slidably mounted for reciprocation between the body members 2G and located between the shock absorbing disc 55 and the top stop 51 is the plunger It. Said plunger I9 comprises a bottom wall 6B (Fig. 4), a front wall 6I extending upwardly therefrom, a rear wall 62 extending upwardly therefrom and parallel to the front wall, and side walls E3 extending upwardly from the bottom wall and parallel to each other.

Attached to the front wall 2| by means of rivet 64 is a driver blade 65 which moves through the groove 53 in the bottom stop 5|. The head of the rivet |54 moves through the outwardly above the recessed portion 52.

recessed portion 5&3 of the front wall 4e of cover or nose piece 45. At the upper end of the front wall il is a forwardly pressed portion S5 (Fig. 5) to contact the inner surface of the front wall The plunger is thus guided up and down as it is moved in the manner hereinafter appearing.

Disposed within the plunger and between the bottom wall 60 and the top stop 51 is a coil compression spring 61 which normally presses the plunger down against the shock absorber 65. Pressed outwardly from the side walls 63 of the plunger are raised lugs 68. The lugs 68 have krearwardly and upwardly inclined underedges 62, and rear vertical edges 1|).

It will now be understood that when the plunger I9 is raised the spring El will be compressed, and when the plunger is released the compressed spring will cause the plunger to descend forcefully to drive a staple, as will appear hereinafter.

Disposed within the bottom of the body and between the side walls 2| is a staple magazine 1|. The staple magazine 1| may be similar to the staple magazine shown in my copending application Serial No. 42,760, filed on August 6, 1948, for Tacker. Said staple magazine includes means to mount a staple strip, and means to push it forwardly to a throat 12 located at the forward end of the staple magazine and below the grooves 53, so that the driver blade may press the forwardmost staple in the staple strip down through said throat 12. The staple magazine may include a removable pusher actuated by mechanism 13 received within the cut outs 21 at the rear end of the body, all as disclosed in said copending application Serial No. 42,760.

The handle I2 comprises a top wall 80 from which extend downwardly side flanges 8|. The side walls 8| have openings through which the pivot pin I3 passes. On the pivot pin I3 is a coil torsion spring S2 having one arm 83 contacting the underside of the top wall of the handle, and a second arm 34 contacting the top stop 51. The coil torsion spring 82 normally tends to raise the handle so that the front edge 85 of the top wall of the handle contacts the upper edge 86 of the front wall 46 of the nose piece for limiting the upward movement of the handle.

The bracket I4 comprises a top wall B1 riveted 2&5733384 Ifhe; ivotgpinfl .isa-carried by the lower ends ofsthe rms iofithe linkl5. -The trigger-H comprises-:atop-Fwemportion 19S (-Fig. v1) from which lextend.,dawn-ward1y 1: parallel side walls-99.. Extending-from L walzlsfiiare-.aperturedi-ears m0 throughewfh-oh thegpivot-bpin ldgpasses. The. side walls, gare .termed with longitudinal vslots f 1 0 I having-at their reariendsgupwardly Voffsetpoi-tions M12'. (-E '1 g6-) Saidsidefwalls-S have frontdownwardly andJ rearwardly :curved forwardedges |113 and 30p :forwardly and downwardly inclinededges I 04. l1-hei4 sidewalls;9 9fstraddle the plunger and are. located ad-jacent .the outer surfaces Eof the side-wallsfaof saidplunger. Intl-,1e normalpositiOn-ShQWh s1 the iorwardvends of the sidewalls-99 arelooated below the;lower= edges E9e-,oftheoutwardlyfpressed lugs 68 vonathe side Walzofthe plunger. --Eurtherrnore, the vcoiltorsiongspring .9 2itend-ingto-.rotate the link l5 in a.,;;1ock-,wisefdirection f also-slidesthe trigger H downwardly and 1 forwardlyto bring the transt'ersegpnqllfl toetheirearyoiseteends- M12-0f the slotsitli.

eThesidezwalls, 2;l. of thebody members 2Q vare formed with outwardly pressed stop portions H15 havinghorizontal upper ledges M16. These :stop memherssserve .toi` limit downward. movement of thefhandlelZ. -When7the lower edges l'iof .the side-walls 8l of ,-saidhandle ,Contact the edges |06; l0f. .tl,1e stop, members l 5, downward'grotaton of.-;the',handle. is stopped.

The operationi.ofthe dev-ice will, now bede- Fig.,1, nponfdepressingthe handle lf2 downwardly fremlthenosition-.showny.imFig l-td the position shownin Fig. .-5, the v four/'ard endsv :of the edgges IM engagingthe. underedges 69 of thellig l(i8,-

aslthe. handle is squeezed `to the pointfvwhere theA plunger is released. If the handle is thereafter released the driver Spring 82 willlift the handle, and ,asthe handle,v islifted.v the coil torsioni spring 92...,tends to move-the trigger. Il 'forwardlyagain blut .during.such; .action. the forward r 4cammed or curved-edges v l (13. 4of .the .side .walls 99 engagingtheilngfslli will pushbackthetrigger until the forward' Vend' Aof ,the trigger 4bypasses. the lugs. 'I'lierreleased position of the plunger. with the handlepstillsqueezed down, isshown in Fig. ,6.

It' w i11 be noted that when thatrigger. ismoved 4.3 scribed. Beginning with the parts as-sl-iowniin f orwardly-asishown -.-Fi g. 1 1, the rivet nin M iS intheupwardly-nffsetirortion 0 2 o f f t I al., Thus the triggerisrheldf its-for d 0!- sition as it;rotates abontthe pivot;pin;4l, unti;l ipasses the Grit-mal angle-wherein is pulled-down Wimily and;reanizarriba:andv in such position-fthe rin 47| noflorfiger Occupiesgthe oiisetxnqrtionfl but is then disposedfin the 'forwardeends of the Slots il 01 1111 ihrs be aseen that inl- 1erais'providediaA device in which the severalobjects of :this ven-tieni are achieved and --whieh is :.well :adapted icimeet the renditions of practical use -sAs various; pessi-bleembodiments mightibefmade of the above i invention, fand fas various ehmges might be made in :theier.nibodiment aboife'fset forth,;it=is; to be understoodzthatiall matterhere-V in Set iorth orshown in .the,:accempanying-drawings is to'befinterpretedas illustrative andznotin a limiting-Sense Having :thus .deseribed ,-my invent-ion I claim as-newv anddes-ire toxsecurebyhetters Patent A1.,;A- tacker comprising a abody,. .ainlungerfslida able in said body, spring means to depress 'fthe' 1 plnngenaa handle mounted on-the' bodyior.. moi/,e-

ment in opposite directionsand beingmoriblef brigand pressnrereilativento the;` hodyrini-,onefdirectionpspring imeans; to move said handle irelati-ve to the body in the Opposite direcionra trigger having a .pivotal nin-andfslot connection: Iwith the body at anintermediate portion -..of the trigger,;means including azlfnkfinterconneeting -the rear end ofthentrigger withfzthezhandle mea-ns on the plunger disengageablyz engageiing said handle in rse/id frst direction tomaise' Said plunger against :sadspring means, andro null said trigger out :of vfengagement .with-refspect to saidplungerwhensaidl plunger israised a pre-determineddistance sortira-tithe plunger descends due to pressure-:0f aitssnrin'g means.

V2. The. combination ,or claim 1 ini- 10rnloir-iation.V

with spring ymeans Vto rotate the link relative' and down -sliding movement, adepressiblerhandle pivoted to the body, a springfmeansior raising: the handle, -aY-bracket attaehed to the underside. of the handle, a link pivotedatvits upper endter the bracket and movable :downwardly Aupon-: de-4 pression of the handle, a torsion s pringfforzro-f tating the link `relative to the bracket, a :trigger pivot'ed-atis lrearaenci to the "lower fendfzthe link, atransverse xedgpm 'within' ,thev body; rear# wardly4 0f the rlungenaidtriggerrhengformed: with a slot between the ends :thereof thrcmgh`= which Said; pinpasses, saiditrigger having-rearward slidable engagement therewith :ilpon gde-1 pressing the handle, -and Said `pli-mger :being formedwith a lug engageabegat its undersideby the-ifor-ward end of thetriggensaid triggerbeing urged forwardly into -engaginge position1-l9yA said torsion spring vwhereby thevplunger willzle raised, andthe trigger slidablymoved rearwardly to abruptly release the plungernpomdepression. ofsaid. handle.

A5.. A stapler. comprisinga body-aspring driven. plunger moi/ ably disposed in ,the body .for up and down slidingmovement, iadepressble, handle pivoted to the body, spring means for raising the handle, a bracket attached to the underside of the handle, a link pivoted at its upper end to the bracket and movable downwardly upon depression of the handle, a torsion spring for rotating the link relative to the bracket, a trigger pivoted at its rear end to the lower end of the link, a transverse fixed pin within the body, rearwardly of the plunger, said trigger being formed with a slot between the ends thereof through which said pin passes, said trigger having rearward slidable engagement therewith upon depressing the handle, and said plunger being formed with a lug engageable by the forward end of the trigger, said trigger being urged forwardly into engaging position by said torsion spring whereby the plunger will be raised and the trigger slidably moved rearwardly to abruptly release the plunger upon depression of said handle, said trigger having curved front edges adapted to engage said lugs when the handle is raised for pushing the trigger rearwardly relative to the transverse pin to pass by the lugs for reengagement therewith.

6. A stapler comprising a body, a spring driven plunger slidably mounted therein for up and down movement, a depressible handle pivoted to the body, spring means to raise the handle, a bracket attached to the underside of the handle, a pivot pin iixed within the body rearwardly of the plunger, a trigger formed with an intermediate longitudinal slot through which said pivot pin passes, said trigger having rearward slidable engagement therewith upon depressing the handle, a link interconnecting said bracket with the rear end of the trigger and pivoted to said bracket and trigger, means on the plunger engageable by the forward end of said trigger upon depressing the handle, and spring means tending to push the trigger forwardly so that the rear end of the slot engages said pivot pin, whereby depression of said handle will raise the plunger and retract the trigger to abruptly release the plunger, and whereby upon raising of said handle, said spring means and said slot will permit the trigger to pass by the engageable means on the plunger for reengaging therewith.

7. A stapler` comprising a body, a spring driven plunger slidably mounted therein, a depressible handle pivoted to the body, spring means to raise the handle, a bracket attached to the underside of the handle, a pivot pin fixed within the body, a trigger formed with a longitudinal slot through which said pivot pin passes, said trigger having slidable engagement therewith, a link interconnecting said bracket with the rear end of the trigger and pivoted to said bracket and trigger, hook means on the plunger engageable by the forward end of said trigger upon depressing said handle, and spring means tending to push the trigger forwardly so that the rear end of the Slot engages said pivot pin, said slot having an upwardly offset rear end portion to receive and pivotally engage the pivot pin during initial depression of said handle, whereby depression of said handle will raise the plunger and slide the trigger rearwardly to abruptly release the plunger, and upon raising of the handle said spring means and said slot will permit said trigger to pass by said engageable means of said plunger for reengagement therewith.

8. The combination of claim 7, said trigger having a rearwardly curved front end to engagel 9. A stapler comprising a body, a spring driven plunger slidably mounted therein for up and down movement, a depressible handle pivoted to the body, spring means to raise the handle, a bracket .attached to the underside of the handle, a pivot pin fixed within the body rearwardly of the plunger, a trigger formed with an intermediate longitudinal slot through which said pivot pin passes, said trigger having rearward slidable engagement upon depressing the handle,l

a link interconnecting said bracket with the rear end of the trigger and pivoted to said bracket and trigger, means on the plunger engageable by the forward end of said trigger upon depressing the handle, and spring means tending to push the trigger forwardly so that the rear end of the slot engages said pivot pin, whereby depression of said handle will raise the plunger and retract the trigger to abruptly release the plunger, and whereby upon raising of said handle, said spring means and said slot will permit the trigger to pass by the engageable means on the plunger for reengaging therewith, said last mentioned spring means comprising a torsion spring about the pivotal connection between the link and the bracket, said torsion spring having one arm engaging the bracket and one arm engaging the link and tending to rotate the lower end of the link forwardly.

10, A stapling devicecomprising a body having side walls, `a depressible handle pivoted at its forward end to the upper front end of the body, spring means tending to raise the handle, a plunger slidably mounted for vertical movement between said side walls, spring means to press the plunger downwardly, said side walls being interconnected by a transverse fixed pivot pin, a rigger having a top web and downwardly extending side walls, thel front ends of which straddle the plunger, raised lugs on said plunger adapted to be engaged by the upper edges of said front ends of said side walls of the trigger, said side walls of said trigger being formed with slots through which said pivot pin passes having sliding engagement therewith upon depressing the handle, the rear ends of the side walls of the trigger being interconnected by a pin, a bracket attached to the underside of the handle and carrying a pin, and a link interconnecting the pin on the bracket with the pin at the rear end of the trigger, whereby depression of the handlev will raise the plunger and abruptly release the same, and upon release of the handle, said last named spring means and said slots will permit said front ends of said trigger to pass by said lugs on said plunger for reengagement therewith.

11. A stapling device comprising a body havving side walls, a depressible handle pivoted at its forward end to the upper front end of the body, spring means tending to raise the handle, a plunger slidably mounted for vertical movement between said side walls, spring means to press the plunger downwardly, said side walls being interconnected by a transverse xed pivot pin, a trigger having a top web and downwardly eX- tending side walls, the front ends of which straddle the plunger, raised lugs on said plunger adapted to be engaged by the upper edges of said front side of said side walls of the trigger,l

said side walls of said trigger being formed with slots through which said pivot pin passes having sliding engagement therewith upon depressing the handle, the rear ends of the side walls of the trigger being interconnected by a pin, a-

bracket attached to the underside of the handle and carrying a pin, and a link interconnecting the pin on the bracket with the pin at the rear end of the trigger, whereby depression of the handle will raise the plunger and abruptly release the sameand upon release of said handle, said last named spring means and said slots will permit said front ends of said trigger to pass by said lugs on said plunger for reengagement therewith, said link comprising a top interconnecting web disposed above the pin on the bracket, and .arms extending downwardly therefrom and formed with openings through which the pin on the bracket and the pin at the rear end of the trigger Dass.

12. The combination of claim 11 in combination with a coil torsion spring disposed about the pin on the bracket and having one arm engaging a portion of the bracket forwardly of the pin and another arm engaging the front edge of the interconnecting portion of the link.

13. A stapling device comprising a, body having side Walls, ya depressible handle pivoted at its forward end to the upper front end of the body, spring means tending to raise the handle, a plunger slidably mounted for vertical movement between said side Walls, spring means to press the plunger downwardly, said side walls being interconnected by a transverse fixed pivot pin, a trigger having a top web and downwardly extending side walls, the front ends of which straddle the plunger, raised lugs on said plunger adapted to be engaged by the upper edges of said front side of said side Walls of the trigger,

CJI

said side walls of said trigger being formed with slots through which said pivot pin passes having sliding engagement therewith upon depressing the handle, the rear ends of the side walls of the trigger being interconnected by a pin, a bracket attached to the underside of the handle and carrying a pin, and a link interconnecting the pin on the bracket with the pin at the rear end of the trigger, whereby depression of said handle will raise the plunger and abruptly release the same .and upon release of said handle, said last named spring means and said slots will permit said front ends of said trigger to pass by said lugs on said plunger for reengagement therewith, said slots having upwardly oiset rear end portions adapted to receive and pivotally engage said pivot pin.

14. The combination of claim 13, the side walls of said trigger having downwardly and rearwardly curved front edges to engage the rear sides of said lugs for camming said trigger rearwardly, and upper rearwardly and upwardly inclined edges engaging the undersides of said lugs.

FRANK S. BOROUGHS.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 2,300,277 Hansen Oct. 27, 1942 2,492,509 Vandervieren Dec. 27, 1949 2,493,640 Peterson Jan. 3, 1950 

